航空发动机尾喷流大气透过率变化规律研究  

A Study of the Changing Law of Atmospheric Transmittance of Aero-Engine Tail Jet

作　　者：黄龙飞 李瑶 李益文[1] 张浦幼森 陈戈 化为卓 HUANG Longfei;LI Yao;LI Yiwen;ZHANGPU Yousen;CHEN Ge;HUA Weizhuo(National Key Lab of Aerospace Power System and Plasma Technology,Air force Engineering University,Xi’an 710038,China)

机构地区：[1]空军工程大学航空动力系统与等离子体技术全国重点实验室,西安710038

出　　处：《空军工程大学学报》2025年第1期1-9,共9页Journal of Air Force Engineering University

基　　金：国家博士后创新人才支持计划(BX2021370);航空发动机及燃气轮机重大专项基础研究项目(J2019-V-0008-0101);全国重点实验室基金(6142202210307);科技创新团队(2023-CX-TD-22);杰出青年科学基金项目(2022JC-29)。

摘　　要：针对发动机红外辐射特性测试尾喷流近场大气透过率难以全方位准确测量的问题,研究了3~5 μm波段发动机尾喷流不同角度和距离大气透过率对红外辐射特性的影响规律。研究发现:发动机尾喷流核心区的大气透过率相比自然环境下减小了5.65%。随着距离的增加,发动机尾喷流区域的大气透过率与自然环境的差异逐渐增大,在25 m、50 m路径上分别减小了22.64%、29.88%。同时,随着角度的增加,尾喷流对大气透过率的影响逐渐减弱。研究结果可为大气透过率现场测试提供方法支撑,并为评估发动机红外辐射特性提供数据支持。In view of the problem that in the measurement of infrared radiation characteristics for engine tail jet,the near-field atmospheric transmittance of tail jet is difficult to measure accurately in all-direction,this paper studies a law of the influence from near-field atmospheric transmittance at different angles and distances on the infrared radiation characteristics of the tail jet in 3~5μm band,and simultaneously finds that the atmospheric permeability in the core area of the tail jet decreases by 5.65%compared with the natural environment.With the increase of distance,the atmospheric transmittance in the tail jet area of the engine decreases rapidly,and the test distance of 25 meters and 50 meters decreases by 22.64%and 29.88%.With the increase of the test angle,the influence of the tail jet on the atmospheric transmittance decreases.The results show that this scientific research achievement can not only support the measurement of atmospheric transmittance of aero-engine infrared characteristics,but also provide data support for the evaluation of near-field atmospheric transmittance and infrared radiation of tail jet.

关 键 词：航空发动机 大气透过率 非均匀大气 红外特性测试 

分 类 号：V263.4[航空宇航科学与技术—航空宇航制造工程] TN219[电子电信—物理电子学]